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1994-06-01
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1988-07-20
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1995-01-25
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1988-07-20
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1992-08-26
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1992-06-22
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1988-02-17
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1990-07-12
Method of casting reinforced concrete slabs
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1986-01-28
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1989-07-10
Method of manufacturing reinforced concrete precast units in particular
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1989-09-04
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1989-08-19
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1994-08-18
Improved precast concrete slab and method of making same
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1991-08-26
Prefabricated reinforced concrete paving, in particular large-size one and method of making same
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1991-05-06
Method of jointing together precast reinforced concrete slabs
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1994-12-27
Method of making reinforced concrete precast units
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1987-04-16
Method of concrete slab construction
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1986-07-29
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1990-04-17
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1994-01-13
Method of and means for forming apertured concrete slabs
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1989-11-14
Method of prestressed reinforced concrete structures production
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1989-09-28
Method for producing hollow concrete and reinforced concrete elements
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1989-09-04
Method of water-resistant insulating concrete slabs of bridges